IME-a male will build a bubblenest in the small cup that is used as temporary housing that most are brought home in.....

Some male will not build nest until they have eggs in their mouth when spawning, I have a breeder that is like this and another that build a nest half the size of the 10g tank but eats the eggs...go figure...lol....

Don't introduce a female into his tank- he'll tear her to shreds! Unless you are planning on breeding... then do TONNES and TONNES of research. Males and females can't live together, and breeding sometimes takes a long time to get right!